Dudlo Mfg. Co. v. Varley Duplex Magnet Co.
Court of Appeals for the Seventh Circuit
Appeals from the 'District Court of the United States for the District of Indiana. Two suits by the Varley Duplex Magnet Company against the Dudlo Manufacturing Company. From decrees for complainant, defendant appeals.
1Opinion of the Court
MACK, Circuit Judge.
The two cases were heard together in the District Court and the appeals were argued together in this court. No. 2487 involves letters patents Nos. 644,311 and 644,312, and No. 2488, letters patent No. 654,583, all granted to one Anderson and assigned to appellee.
Tetters patent No. 644,311, for a method of winding coils or helices for electrical purposes, and letters patent No. 644,312, for an electrical helix, were held valid and infringed by defendant as to all of the claims. Claim 2 of No. 644,311 reads as follows:
“Tbe method of winding helices for electrical purposes…
2Cases cited5 opinions
- Morley Sewing MacHine Co. v. LancasterSupreme Court of the United States · 1889
- Krell Auto Grand Piano Co. v. Story & Clark Co.Court of Appeals for the Seventh Circuit · 1913
- Columbia Wire Co. v. Kokomo Steel & Wire Co.Court of Appeals for the Seventh Circuit · 1905
- Lewis Blind Stitch Mach. Co. v. Arbetter Felling Mach. Co.Court of Appeals for the Seventh Circuit · 1914
- Mills v. Kip-Armstrong Co.Court of Appeals for the First Circuit · 1904
3Cited by3 opinions
- Independent Oil Well Cementing Co. v. HalliburtonCourt of Appeals for the Tenth Circuit · 1932
- Mantz v. KerstingDistrict Court, S.D. California · 1939
- Aleograph Co. v. Western Electric Co.Court of Appeals for the Second Circuit · 1934